Low-dose integrated chemoimmuno-hormonotherapy with cisplatin, subcutaneous interleukin-2, alpha-interferon and...

Recently, Khayat et al. reported that high-dose recombinant interleukin-2 (rIL-2) i.v. may induce tumour regressions in metastatic melanoma patients through an association with cisplatin (CDDP) and alpha-interferon (alpha-IFN). Treatment-related toxicities are, however, important. Previous studies have demonstrated that rIL-2 toxicity may be reduced through a subcutaneous injection. In order to evaluate the effectiveness of low subcutaneous rIL-2 doses in a chemoimmuno-hormonotherapeutic combination, 36 metastatic melanoma patients were treated with CDDP, rIL-2, alpha-IFN and tamoxifen (TAM). The overall response rate was 47.2%: five patients had complete response (14%), 12 partial response (33%) and 13 stable disease (36%). Median response duration was 6.4 months (range: 2-29+). Median overall survival was 10 months (range: 3-36+). The CDDP/rIL-2/alpha-IFN/TAM regimen was effective both on soft tissue and visceral metastases. Toxicity was low and patient management did not require an intensive care unit. A statistically significant increase in both percentage and absolute values of lymphocytes, eosinophils, CD3+/CD4+, CD25+, CD16/56+ and HLA-DR+ cells was found in all patients after two treatment courses. This study shows that lower doses of subcutaneous rIL-2, as well as CDDP and alpha-IFN, associated with TAM, may have similar anticancer efficacy with respect to Khayat's schedule but lower toxicity.